/Engine/Plugins/Runtime/nDisplay/Source/DisplayClusterOperator/Public/IDisplayClusterOperator.h
Gets the extensibility manager for the operator panel's menu bar
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FExtensibilityManager](API\Editor\UnrealEd\Toolkits\FExtensibilityManager) > GetOperatorMenuExtensibilityManager()